Tech Tips – HVAC School For HVAC Techs, By HVAC Techs (Refrigeration as well)
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TD of Refrigeration Evaporators
We have discussed DTD (Design Temperature Difference) quite a bit for air conditioning applications, but what about refrigeration? Let’s start by […]
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Shielded Control Cable & Communicating Controls
When I first started in the trade we used to run into shielded control wires on the Carrier Comfort Zone 1 zoning systems and also on a Carrier VVT system I […]
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Cycle Rate Settings – A Quick Review
Most controls and thermostats will have some sort of cycle rate per hour setting that kicks in to prevent over cycling once setpoint is reached. These cycle […]
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Fan Blade Shroud Depth
When a system has abnormally high head pressure (high condensing temperature over ambient) and compression ratio, one of the easiest things to look for […]
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What to Check Before Condemning the TXV
I just noticed this portion of the Carrier air handler sticker for the first time the other day. I’m like most techs, it’s easy for us to ignore […]